Orthopedic compression/distraction device

Patent metadata

Field	Value
Publication number	US-9770272-B2
Application number	US-201414212882-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Dec 12, 2012
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

An orthopedic device configured for use as a compressor or a distractor is provided. The device has two arm members and a locking sleeve for securely holding an elongated pin is attached to each of the two arm members. The locking sleeve are hingeably connected to the outer end of each of the two arm members by a biaxial hinge block, wherein the biaxial hinge block is configured to allow the locking sleeve to swivel in two different directions about two orthogonally oriented axes.

First claim

What is claimed is:

1. An orthopedic device comprising:
an elongated body having first and second ends;
a first arm member attached to and extending away from said first end and terminating at an outer end;
a second arm member extending from said elongated body and having a base portion and an outer end, wherein the base portion is configured and adapted to engage the elongated body and allow the second arm member to be longitudinally movable along said elongated body, said second arm member extending from the elongated body in a same direction as the first arm member; and
a locking sleeve hingeably connected to the outer end of each of the first and second arm members by a biaxial hinge block, wherein the locking sleeve is configured for receiving and locking on to an elongated pin and said biaxial hinge block is configured to allow each of the locking sleeve to swivel in two different directions with respect to its corresponding arm member about two orthogonally oriented swivel axes;
wherein said locking sleeve is provided with a swiveling shaft orthogonally extending from an elongated shaft, said locking sleeve being connected to the biaxial hinge block by the swiveling shaft and received in the biaxial hinge block along one of the two orthogonally oriented swivel axes such that a first of the two orthogonally oriented swivel axes is oriented parallel to the elongated body of the orthopedic device and the swiveling shaft of the locking sleeve is received in the biaxial hinge block along a second of the two orthogonally oriented swivel axis, and the swiveling shaft is movable within the biaxial hinge block along the second swivel axis between two positions, a first position that prevents the locking sleeve from swiveling about the second swivel axis and a second position allowing the locking sleeve to swivel about a second of the two orthogonally oriented swivel axis.

2. The orthopedic device of claim 1 , wherein said locking sleeve comprises an elongated pin receiving bore extending therethrough and a collet provided at one end of the elongated shaft, said collet comprising a plurality of collet arms provided with screw threads integrally formed on their exterior surfaces, and a collet nut that is threadably engaged to the collet for locking the elongated pin that is received in the elongated pin receiving bore.

3. The orthopedic device of claim 1 , wherein the biaxial hinge block provided with a through-hole for receiving the swiveling shaft therethrough, the through-hole having an end-cap-receiving portion, wherein the swiveling shaft is provided with an end cap that captures a coil spring inside the end-cap-receiving portion of the through-hole, wherein the coil spring is in a normally compressed state inside the end-cap-receiving portion urging against the end cap and pulling the swiveling shaft further into the through-hole toward the first position.

4. The orthopedic device of claim 1 , wherein the swiveling shaft is provided with one or more alignment tabs near its base portion and a through-hole has an alignment-tab-receiving end that is configured and adapted to receive the one or more alignment tabs, wherein the alignment-tab-receiving end of the through-hole has an opening outline that matches transverse cross-sectional outline of the one or more alignment tabs thereby when in the first position, the one or more alignment tabs engage with the alignment-tab-receiving end and prevent the locking sleeve from swiveling about the second of the two orthogonally oriented swivel axis.

5. The orthopedic device of claim 1 , wherein the first position holds the locking sleeve in an orientation that keeps the elongated shaft of the locking sleeve in a parallel orientation with the arm members of the orthopedic device.

6. The orthopedic device of claim 1 , further comprising a locking key provided in the biaxial hinge block that engages the swiveling shaft to lock the swiveling shaft in the second position.

7. The orthopedic device of claim 1 , wherein a locking key is spring-loaded within the biaxial hinge block to be urged in the direction transverse to the second of the two orthogonally oriented swivel axis.

8. The orthopedic device of claim 6 , wherein the swiveling shaft is configured with an annular groove that engages the locking key when the swiveling shaft is in the second position.

9. The orthopedic device of claim 8 , wherein when the swiveling shaft is in the first position, the locking key and the annular groove are not engaged while alignment tabs provided on the swiveling shaft and an alignment-tab-receiving end are engaged and thus preventing the swiveling shaft from swiveling in the second of the two orthogonally oriented swivel axis.

10. An assembly comprising:
a biaxial hinge block; and
a locking sleeve, wherein the biaxial hinge block and the locking sleeve are configured to hingeably connect the locking sleeve to an arm member of an orthopedic device, said biaxial hinge block being configured to allow the locking sleeve to swivel in two different directions with respect to the arm member about two orthogonally oriented swivel axes;
wherein said locking sleeve is provided with a swiveling shaft orthogonally extending from an elongated shaft, said locking sleeve being connected to the biaxial hinge block by the swiveling shaft and received in the biaxial hinge block along one of the two orthogonally oriented swivel axes such that a first of the two orthogonally oriented swivel axes is oriented parallel to an elongated body of the orthopedic device and the swiveling shaft of the locking sleeve is received in the biaxial hinge block along a second of the two orthogonally oriented swivel axis; and the swiveling shaft is movable within the biaxial hinge block along the second swivel axis between two positions, a first position that prevents the locking sleeve from swiveling about the second swivel axis and a second position allowing the locking sleeve to swivel about a second of the two orthogonally oriented swivel axis.

11. The assembly of claim 10 wherein said locking sleeve comprises an elongated pin receiving bore extending therethrough and a collet provided at one end of the elongated shaft, said collet comprising a plurality of collet arms provided with screw threads integrally formed on their exterior surfaces, and a collet nut that is threadably engaged to the collet for locking an elongated pin that is received in the elongated pin receiving bore.

12. The assembly of claim 10 , wherein the biaxial hinge block provided with a through-hole for receiving the swiveling shaft therethrough, the through-hole having an end-cap-receiving portion, wherein the swiveling shaft is provided with an end cap that captures a coil spring inside the end-cap-receiving portion of the through-hole, wherein the coil spring is in a normally compressed state inside the end-cap-receiving portion urging against the end cap and pulling the swiveling shaft further into the through-hole toward the first position.

13. The assembly of claim 10 , wherein the swiveling shaft is provided with one or more alignment tabs near its base portion and a through-hole has an alignment-tab-receiving end that is configured and adapted to receive the one or more alignment tabs, wherein the alignment-tab-receiving end of the through-hole has an opening outline that matches transverse cross-sectional outline of the one or more alignment tabs thereby when in the first position, the one or more alignment tabs engage with the alignment-tab-receiving end and prevent the locking sleeve from swiveling about the second of the two orthogonally oriented swivel axis.

14. The assembly

Assignees

• Wright Medical Tech Inc

Inventors

• Thoren Brian
• Mccormick Daniel
• Reed Wesley
• Cramer Thomas
• Lowery Gary
• Harness David

Classifications

• A61B17/7077 Primary

  for moving bone anchors attached to vertebrae, thereby displacing the vertebrae · CPC title

• A61B17/8866

  for gripping or pushing bones, e.g. approximators (joint distractors A61B17/025) · CPC title

• A61B17/66

  {Alignment}, compression or distraction mechanisms · CPC title

• A61B17/6483

  the connecting rod having a non-circular section · CPC title